Improvement in ore-crushers



Patented May 26,1874.

CLIF H] R D.

Crushers.

T. & J.

Wilfizesses.

Inwlam UNITED STATES PATENTQFEICL THOMAS CLIFFORD AND JAMES CLIFFORD, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN ORE-CRUSHERS.

Specification forming part of Letters Patent No. 151,275, dated May 26, 1874; application filed February 26, 1874.

To all whom it may concern:

Be it known that we, THOMAS CLIFFORD and JAMES CLIFFORD, of Pittsburg, in the county of Allegheny and State of Pennsylvania,

have invented certain new and useful Improvements in Clay and Ore Crushers; and we do hereby declare that the following is a full, clear, and exact description thereof, ref erence being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Our invention relates to machinery for crushing clay, ores, quartz, or other hard substances.

In the accompanying drawing, Figure 1 is a top view or plan of our improved machine. Fig. 2 is a side elevation thereof. Fig. 3 is a cross-section through J K.

Upon the central cross-piece a of a frame, of which A A form the longitudinal pieces, rests a block, a countersunk at its center for the reception and bearing of vertical shaft c Upon the supports B B, which connect the upper and lower frames, rests the frame 0, with movable cross-piece G attached thereto by belts or other suitable means. For the purpose of holding the said vertical shaft in position at its upper extrenr ity, an orifice is formed for its reception in the center of said crosspiece Firmly secured to vertical shaft c is the circular pan D, supported underneath by strong arms (1 radiating from boss d Into the bed of pan D, and outside of the track of rollers E E, are inserted a series of movable plates, 01 having countersunk perforations in any required number. These plates (1 are replaced at pleasure by other plates having larger or smaller perforations or other means of outlet.

That portion of the bed of pan D over which the rollers continually pass is made detachable, so as to be readily replaced when required.

Suitable rollers E E are placed in the said pan D, and, when in operation, are rotated by friction caused by their contact with the material being ground in the pan. The saidrollers E E work loosely on the shaft 6 and which is supported by brackets F F, in which the slidin gbearin gs e are placed. To the crosspiece C are attached suitable scrapers (J and C Underneath the pan D, of the width, or thereabout, of plates (1 and immediately under them, is placed a stationary circular trough or hopper, H, supported and held in position by the timbers h or by other suitable means. In the bottom of this trough or hopper is an orifice, from which runs the spout or outlet h Attached to the arms 11 are two or more scrapers, at, so arranged as to work in the said trough H, to carry the material deposited therein to the outlet h In the construction of our improved machine we do not restrict ourselves to any particular material from which to make the whole or any part thereof.

In the operation of this machine it will be understood that the motive power is applied to the vertical shaft a by bevel wheels, or other suitable means, whence the pan D is rotated and the rollers E E turned by friction. The material to be ground is placed in the said pan D, and kept continually in motion by means of scrapers and C the said scrapers O (l throwing the material over the perforated plates 61 and that portion of it pulverized sufficiently passes through the perforations, while that portion of it requiring more grinding is again thrown under the rollers by means of scrapers (l C. This pro cess is continued until the 'whole of the material thrown into the pan is thoroughly pulverized and passed into the trough or hopper H underneath, in which it is drawn around by means of scrapers d. to the orifice over the spout k whence it passes out.

The principal advantages of our improvement are, its simplicity of construction, its effectiveness, and the accessibility of its various parts for repair or replacement. It is also selfacting.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

The revolving pan 1), provided with perforated plates outside the track of the roller E, in combination with the scrapers C and O stationary circular trough. H W, and wings d fixed to the bottom of pan D, substantially as and for the purpose specified.

In testimony that we claim the foregoing as our own we affix our signatures in presence of two witnesses.

THCMAS CLIFFORD, .JAMES CLIFFORD.

Witnesses HALL PATTERSON, PETER KREUTER. 

